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INTERNATIONAL STANDARD IEC 61131-3 Second edition 2003-01 Programmable controllers – Part 3: Programming languages ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Automates programmables – Partie 3: Langages de programmation Reference number IEC 61131-3:2003(E) Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST Publication numbering As from January 1997 all IEC publications are issued with a designation in the 60000 series For example, IEC 34-1 is now referred to as IEC 60034-1 Consolidated editions The IEC is now publishing consolidated versions of its publications For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment and the base publication incorporating amendments and Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology Information relating to this publication, including its validity, is available in the IEC Catalogue of publications (see below) in addition to new editions, amendments and corrigenda Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: • IEC Web Site (www.iec.ch) • Catalogue of IEC publications The on-line catalogue on the IEC web site (http://www.iec.ch/searchpub/cur_fut.htm) enables you to search by a variety of criteria including text searches, technical committees and date of publication On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda • IEC Just Published This summary of recently issued publications (http://www.iec.ch/online_news/ justpub/jp_entry.htm) is also available by email Please contact the Customer Service Centre (see below) for further information • Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Email: custserv@iec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST INTERNATIONAL STANDARD IEC 61131-3 Second edition 2003-01 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Programmable controllers – Part 3: Programming languages Automates programmables – Partie 3: Langages de programmation IEC 2003 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch Com mission Electrotechnique Internationale International Electrotechnical Com m ission Международная Электротехническая Комиссия Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST PRICE CODE XE For price, see current catalogue –2– 61131-3 IEC:2003(E) CONTENTS FOREWORD Common elements .23 2.1 Use of printed characters 23 2.1.1 Character set 23 2.1.2 Identifiers 23 2.1.3 Keywords 24 2.1.4 Use of white space 24 2.1.5 Comments 24 2.1.6 Pragmas .25 2.2 External representation of data .25 2.2.1 Numeric literals 25 2.2.2 Character string literals 26 2.2.3 Time literals 28 2.2.3.1 Duration .28 2.2.3.2 Time of day and date .29 2.3 Data types .29 2.3.1 Elementary data types 30 2.3.2 Generic data types .31 2.3.3 Derived data types 32 2.3.3.1 Declaration 32 2.3.3.2 Initialization 33 2.3.3.3 Usage 35 2.4 Variables 36 2.4.1 Representation .36 2.4.1.1 Single-element variables 36 2.4.1.2 Multi-element variables .38 2.4.2 Initialization 38 2.4.3 Declaration 39 2.4.3.1 Type assignment .41 2.4.3.2 Initial value assignment .42 2.5 Program organization units .45 2.5.1 Functions 45 2.5.1.1 Representation 46 2.5.1.2 Execution control .49 2.5.1.3 Declaration 50 2.5.1.4 Typing, overloading, and type conversion .52 2.5.1.5 Standard functions 55 2.5.1.5.1 Type conversion functions 55 2.5.1.5.2 Numerical functions 56 2.5.1.5.3 Bit string functions 59 2.5.1.5.4 Selection and comparison functions .59 2.5.1.5.5 Character string functions 62 2.5.1.5.6 Functions of time data types 64 2.5.1.5.7 Functions of enumerated data types 66 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - General 1.1 Scope .9 1.2 Normative references 1.3 Definitions 1.4 Overview and general requirements .14 1.4.1 Software model 14 1.4.2 Communication model 16 1.4.3 Programming model .18 1.5 Compliance 19 1.5.1 System compliance 20 1.5.2 Program compliance 22 61131-3 IEC:2003(E) –3– Textual languages 123 3.1 Common elements 123 3.2 Instruction list (IL) 123 3.2.1 Instructions 123 3.2.2 Operators, modifiers and operands 124 3.2.3 Functions and function blocks 126 3.3 Structured Text (ST) 129 3.3.1 Expressions 129 3.3.2 Statements 131 3.3.2.1 Assignment statements 133 3.3.2.2 Function and function block control statements 133 3.3.2.3 Selection statements .133 3.3.2.4 Iteration statements 134 Graphic languages 135 4.1 Common elements 135 4.1.1 Representation of lines and blocks .135 4.1.2 Direction of flow in networks .135 4.1.3 Evaluation of networks .136 4.1.4 Execution control elements 138 4.2 Ladder diagram (LD) .139 4.2.1 Power rails 139 4.2.2 Link elements and states 139 4.2.3 Contacts .140 4.2.4 Coils 140 4.2.5 Functions and function blocks 140 4.2.6 Order of network evaluation .141 4.3 Function Block Diagram (FBD) 143 4.3.1 General .143 4.3.2 Combination of elements 143 4.3.3 Order of network evaluation .143 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - 2.5.2 Function blocks 66 2.5.2.1 Representation 67 2.5.2.1a) Use of EN and ENO in function blocks 68 2.5.2.2 Declaration 69 2.5.2.3 Standard function blocks 77 2.5.2.3.1 Bistable elements 77 2.5.2.3.2 Edge detection 78 2.5.2.3.3 Counters 78 2.5.2.3.4 Timers 81 2.5.2.3.5 Communication function blocks 83 2.5.3 Programs 83 2.6 Sequential Function Chart (SFC) elements 84 2.6.1 General 84 2.6.2 Steps 84 2.6.3 Transitions 86 2.6.4 Actions 89 2.6.4.1 Declaration 89 2.6.4.2 Association with steps .91 2.6.4.3 Action blocks .92 2.6.4.4 Action qualifiers 93 2.6.4.5 Action control 94 2.6.5 Rules of evolution 99 2.6.6 Compatibility of SFC elements 107 2.6.7 SFC Compliance requirements 108 2.7 Configuration elements 108 2.7.1 Configurations, resources, and access paths 110 2.7.2 Tasks 114 –4– 61131-3 IEC:2003(E) ANNEX B (normative) Formal specifications of language elements 146 B.0 Programming model 146 B.1 Common elements 146 B.1.1 Letters, digits and identifiers .146 B.1.2 Constants 147 B.1.2.1 Numeric literals 147 B.1.2.2 Character strings 147 B.1.2.3 Time literals 148 B.1.2.3.1 Duration 148 B.1.2.3.2 Time of day and date 148 B.1.3 Data types 149 B.1.3.1 Elementary data types 149 B.1.3.2 Generic data types 149 B.1.3.3 Derived data types 149 B.1.4 Variables 151 B.1.4.1 Directly represented variables 151 B.1.4.2 Multi-element variables 151 B.1.4.3 Declaration and initialization 152 B.1.5 Program organization units 154 B.1.5.1 Functions .154 B.1.5.2 Function blocks .155 B.1.5.3 Programs .156 B.1.6 Sequential function chart elements 156 B.1.7 Configuration elements 157 B.2 Language IL (Instruction List) .159 B.2.1 Instructions and operands 159 B.2.2 Operators 159 B.3 Language ST (Structured Text) 160 B.3.1 Expressions 160 B.3.2 Statements 160 B.3.2.1 Assignment statements 161 B.3.2.2 Subprogram control statements 161 B.3.2.3 Selection statements .161 B.3.2.4 Iteration statements .161 ANNEX C (normative) Delimiters and keywords 162 ANNEX D (normative) Implementation-dependent parameters 165 ANNEX E (normative) Error conditions .167 ANNEX F (informative) Examples .169 F.1 Function WEIGH 169 F.2 Function block CMD_MONITOR 170 F.3 Function block FWD_REV_MON 173 F.4 Function block STACK_INT 178 F.5 Function block MIX_2_BRIX 183 F.6 Analog signal processing 186 F.6.1 Function block LAG1 187 F.6.2 Function block DELAY 187 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - ANNEX A (normative) Specification method for textual languages 144 A.1 Syntax 144 A.1.1 Terminal symbols .144 A.1.2 Non-terminal symbols 144 A.1.3 Production rules 145 A.2 Semantics .145 61131-3 IEC:2003(E) –5– ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - F.6.3 Function block AVERAGE 188 F.6.4 Function block INTEGRAL 188 F.6.5 Function block DERIVATIVE .189 F.6.6 Function block HYSTERESIS .189 F.6.7 Function block LIMITS_ALARM 190 F.6.8 Structure ANALOG_LIMITS 190 F.6.9 Function block ANALOG_MONITOR 191 F.6.10 Function block PID 192 F.6.11 Function block DIFFEQ .193 F.6.12 Function block RAMP 194 F.6.13 Function block TRANSFER 195 F.7 Program GRAVEL 195 F.8 Program AGV 203 F.9 Use of enumerated data types 206 F.10 Function block RTC (Real Time Clock) 206 F.11 Function block ALRM_INT 206 ANNEX G (informative) Reference character set 208 Index 210 Table - Character set features 23 Table - Identifier features 24 Table - Comment feature 25 Table 3a - Pragma feature 25 Table - Numeric literals 26 Table - Character string literal features .27 Table - Two-character combinations in character strings 28 Table - Duration literal features 29 Table - Date and time of day literals 29 Table - Examples of date and time of day literals .29 Table 10 - Elementary data types 30 Table 11 - Hierarchy of generic data types 32 Table 12 - Data type declaration features 33 Table 13 - Default initial values of elementary data types 34 Table 14 - Data type initial value declaration features 35 Table 15 - Location and size prefix features for directly represented variables 37 Table 16a - Variable declaration keywords 39 Table 16b - Usages of VAR_GLOBAL, VAR_EXTERNAL and CONSTANT declarations 41 Table 17 - Variable type assignment features 41 Table 18 - Variable initial value assignment features 43 Table 19 - Graphical negation of Boolean signals 47 Table 19a - Textual invocation of functions for formal and non-formal argument list 49 Table 20 - Use of EN input and ENO output 50 Table 20a - Function features 51 Table 21 - Typed and overloaded functions 53 Table 22 - Type conversion function features 55 Table 23 - Standard functions of one numeric variable 57 Table 24 - Standard arithmetic functions 58 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST –6– 61131-3 IEC:2003(E) Table 25 - Standard bit shift functions 59 Table 26 - Standard bitwise Boolean functions 60 d Table 27 - Standard selection functions 61 Table 28 - Standard comparison functions 62 Table 29 - Standard character string functions 63 Table 30 - Functions of time data types 64 Table 31 - Functions of enumerated data types 66 Table 32 - Examples of function block I/O variable usage .68 Table 33 - Function block declaration and usage features 71 a Table 34 - Standard bistable function blocks .77 Table 35 - Standard edge detection function blocks 78 Table 36 - Standard counter function blocks 79 Table 37 - Standard timer function blocks 81 Table 38 - Standard timer function blocks - timing diagrams 82 Table 39 - Program declaration features 83 Table 40 - Step features 85 Table 41 - Transitions and transition conditions 87 Table 42 - Declaration of actions a,b 90 Table 43 - Step/action association 92 Table 44 - Action block features .93 Table 45 - Action qualifiers .94 Table 45a - Action control features 98 Table 46 - Sequence evolution 101 Table 47 - Compatible SFC features 108 Table 48 - SFC minimal compliance requirements 108 Table 49 - Configuration and resource declaration features 112 Table 50 - Task features .116 Table 51a - Examples of instruction fields 124 Table 51b - Parenthesized expression features for IL language 125 Table 52 - Instruction List operators 125 Table 53 - Function Block invocation and Function invocation features for IL language .127 Table 54 - Standard Function Block input operators for IL language 129 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Table 55 - Operators of the ST language 131 Table 56 - ST language statements .132 Table 57 - Representation of lines and blocks .136 Table 58 - Graphic execution control elements 138 Table 59 - Power rails 139 Table 60 - Link elements 140 a Table 61 - Contacts 141 Table 62 - Coils 142 Table C.1 - Delimiters 162 Table C.2 - Keywords 163 Table D.1 - Implementation-dependent parameters 165 Table E.1 - Error conditions 167 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST 61131-3 IEC:2003(E) –7– Table G.1 - Character representations .208 Table G.2 - Character encodings 209 Figure - Software model 15 Figure a) - Data flow connection within a program 16 Figure b) - Communication via GLOBAL variables .16 Figure c) - Communication function blocks 17 Figure d) - Communication via access paths 17 Figure - Combination of programmable controller language elements .19 Figure - Examples of function usage 45 Figure - Examples of function declarations and usage .52 Figure - Examples of explicit type conversion with overloaded functions 54 Figure - Examples of explicit type conversion with typed functions 54 Figure - Function block instantiation examples 67 Figure 10 - Examples of function block declarations 70 Figure 11 a) - Graphical use of a function block name as an input variable 73 Figure 11 b) - Graphical use of a function block name as an in-out variable .74 Figure 11 c) - Graphical use of a function block name as an external variable .75 Figure 12 - Declaration and usage of in-out variables in function blocks .76 Figure 14 - ACTION_CONTROL function block - External interface (Not visible to the user) 95 Figure 15 a) - ACTION_CONTROL function block body with “final scan” logic .96 Figure 15 b) - ACTION_CONTROL function block body without “final scan” logic 97 Figure 16 a) - Action control example - SFC representation 98 Figure 16 b) - Action control example - functional equivalent 99 Figure 17 - Examples of SFC evolution rules .105 Figure 18 a) - Examples of SFC errors: an “unsafe” SFC 106 Figure 18 b) - Examples of SFC errors: an “unreachable” SFC 107 Figure 19 a) - Graphical example of a configuration 109 Figure 19 b) - Skeleton function block and program declarations for configuration example 110 Figure 20 - Examples of CONFIGURATION and RESOURCE declaration features 113 Figure 21 a) - Synchronization of function blocks with explicit task associations 120 Figure 21 b) - Synchronization of function blocks with implicit task associations 121 Figure 21 c) - Explicit task associations equivalent to figure 21 b) 122 Figure 22 - EXIT statement example 134 Figure 23 - Feedback path example 137 Figure 24 - Boolean OR examples 143 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Figure - Use of formal argument names 48 61131-3 IEC:2003(E) –8– INTERNATIONAL ELECTROTECHNICAL COMMISSION PROGRAMMABLE CONTROLLERS – ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Part 3: Programming languages FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees) The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields To this end and in addition to other activities, the IEC publishes International Standards Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights The IEC shall not be held responsible for identifying any or all such patent rights International Standard IEC 61131-3 has been prepared by subcommittee 65B: Devices, of IEC technical committee 65: Industrial-process measurement and control The text of this standard is based on the following documents: FDIS Report on voting 65B/456/FDIS 65B/465/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table This second edition of IEC 61131-3 cancels and replaces the first edition, published in 1993, and constitutes a technical revision This International Standard has been reproduced without significant modification to its original contents or drafting The committee has decided that the contents of this publication will remain unchanged until 2007 At this date, the publication will be • • • • reconfirmed; withdrawn; replaced by a revised edition, or amended Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST – 210 – Index Primary references for delimiters and keywords are given in annex C absolute time, 28 access path, 108, 110 communication, 16 keyword, 39 loading/deletion, 16 programming, 18 action, 84, 89, 123 control, 94 qualifiers, 93 action block, 89, 91, 92, 95 active association, 95 active association, 95 activity flow, 135 aggregate, 10 argument, 66, 130, 133 array declaration, 32, 42 initialization, 33, 42 location assignment, 42 usage, 38, 134 assignment, 86 FOR loop variable values, 134 operator, 33, 86 statement, 133 assignment, 47, 49, 51, 68 based number, 10, 25 bistable function block, 77 bit string comparison, 59 data types, 30 functions, 59 initial value assignment, 42 variable declaration, 41 body function, 51, 133 function, 49, 68 function block, 66 program organization unit, 136 Boolean AND, in ladder diagrams, 140 data type, 30 default initial value, 34 edge detection, 69, 78 expression, 86, 130, 133, 134 functions, 59 functions, 95 input, action control, 95 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST 61131-3 IEC:2003(E) 61131-3 IEC:2003(E) – 211 – ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - input, RETURN, 138 literals, 25 negation, 47 operators, 130 OR, LD vs FBD, 143 output, 138 signal, 138 values, power flow, 139 variable, 84, 85, 89, 90, 94, 114, 134, 138 variable, in ladder diagrams, 140 byte (data element size), 37 BYTE (data type), 30, 34 case (of characters), 23, 24, 28 CASE statement, 133 character code, 24, 62 character set, 23, 84, 135, 141 character string character positions in, 62 comparison, 62 data type, 30 functions, 62 initialization, 42 literals, 26 variable declaration, 41 cold restart, 38, 41, 42, 43, 44 comment, 24 comparison bit strings, 59 character strings, 62 functions, 59, 66 compilation, 21 compliance, 19 action declarations, 89 EXIT statement, 132 programs, 22 sequential function chart (SFC), 108 step/action association, 91 syntax, 21 system, 20 concatenation action blocks, 91, 93 hierarchical addresses, 36 time data, 64 conditional jump, 138 return, 138 configuration communication, 16 elements, 108 initialization, 15 programming, 18 starting and stopping, 15 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST – 212 – 61131-3 IEC:2003(E) connection, 83 connector, 86, 88, 135, 136 contact, 140 counter, 78 data type compliance, 21 declaration, 32 elementary, 30 generic, 31, 53 initialization, 33 of an expression, 129 of functions, 50 of internal variables, 50 programming, 18 usage, 35 date and time, 81 data types, 30 default initial values, 34 functions, 64 literals, 29 decimal number (decimal literal), 25, 135 declaration, 18 access paths, 110 actions, 89, 94 configurations, 108 data types, 32 function blocks, 66, 69 functions, 50, 133 programs, 83 resources, 110 tasks, 114 variables, 39 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - default value, 52 FOR increment, 134 of data types, 33 of variables, 38, 42 task interval, 114 delimiter comments, 24 LD network, 139 network label, 135 time literals, 28 direct representation, 36, 83, 111 in programs, 83 initial value assignment, 42 variable declaration, 41 double word, 30 size prefix, 37 duration data type (TIME), 30 literals, 28 of action qualifiers, 93 of step activity, 100 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST 61131-3 IEC:2003(E) – 213 – edge detection, 69 function blocks, 78 EN/ENO (enable) variables, 49, 50, 68 errors, 24, 32, 36, 40, 46, 47, 49, 52, 55, 56, 59, 61, 63, 64, 69, 85, 87, 95, 100, 114, 115, 124, 130, 133, 134, 137, 167 documentation, 21 handling, 21, 22 reporting, 21 errors, 85, 100, 135 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - evaluation of assignment statements, 133 of expressions, 129 of function blocks, 115 of functions, 58, 130, 133 of language elements, 115 of network elements, 136 of networks, 66, 136, 141, 143 of programs, 115 of transitions, 100 execution of actions, 84 of EXIT statements, 134 of function blocks, 66, 78, 115 of functions, 49 of iteration statements, 134 of loop elements, 137 of programs, 138 of selection statements, 133 execution control element, 84, 114, 136, 138, 141 extensions, 21, 37 documentation, 21 processing, 21 usage, 22 extensions, 24 falling edge, 69, 71, 78 feedback path, 137 variable, 137 FOR statement, 134 function, 45 compliance, 21 control statements, 133 extensible, 55 in LD language, 140 overloaded, 53, 56, 59 programming, 18 return value, 133 signal flow, 135 typing, 53 function (procedure), 11 function block, 11, 14, 66 action control, 94 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST – 214 – 61131-3 IEC:2003(E) communication, 16, 83 compliance, 21 control statements, 133 in LD language, 140 instance, 114, 115 operation, 78, 81 programming, 18 retentive, 85 SFC structuring, 84 signal flow, 135 type, 67 function block diagram, 11 function block diagram (FBD), 14, 143 action blocks in, 93 execution control, 138 loops in, 137 signal flow in, 135 function block instance, 11 function block type, 11 generic data types, 31, 53 global variable, 108 communication, 16 declaration, 39, 83, 110 function block instance, 66 initial value assignment, 42 initialization, 15 loading/deletion, 16 programming, 18 hierarchical addressing, 37 identifier, 50 implementation-dependent feature, 21, 22, 38, 42, 134 side effects, 68 implementation-dependent parameters, 20, 24, 32, 33, 37, 40, 45, 51, 55, 56, 66, 81, 83, 85, 87, 91, 100, 114, 129, 131, 133, 135, 165 initial state, 84 step, 84, 85, 99 initial value assignment, 42 default, 33 feedback variable, 137 FOR loop variable, 134 initialization, 38 function blocks, 69 function blocks, 99 programs, 83 programs, 99 SFC networks, 99 steps, 85 initialization, 15 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - identifier, 23, 66, 84, 86, 135 61131-3 IEC:2003(E) – 215 – input declaration, 39, 50, 69 dynamic, 69 extensible, 55 initialization, 38 instance name, 66 location prefix, 37 negated, 47 overloaded, 53 program, 111 string, 56 variable, 67, 140 variable, 83 input/output variable, 66 instance function block, 66, 67, 69, 70, 71, 114, 115 name, 66, 67, 70, 71 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - instantiation action control, 95 function block, 83 program, 83 instruction, 86, 89 integer data types, 30, 134 literal, 12, 25, 135 invocation by tasks, 114 function block, 133 function block, 66, 67, 69 of actions, 84 of functions, 129 of non-PC language elements, 18 recursive, 45 return from, 138 iteration, 132, 134 keyword, 24 Boolean literals, 26, 86 data types, 30 ELSE statement, 133 FOR statement, 134 function block declaration, 69 function declaration, 50 IF statement, 133 program declaration, 83 REPEAT statement, 134 time literals, 28 transition, 86 variable declaration, 39 WHILE statement, 134 label connector, 135 network, 135, 136, 138 ladder diagram, 139 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST – 216 – evaluation, 136 execution control, 138 network, 86 language element, 14 compliance, 19 programming, 18, 83 library, 18, 110 literal, 25, 129, 139 logical location, 36, 37, 39, 41 long real, 30 long word, 30 memory, 140 memory (user data storage) allocation, 39 direct representation, 36 initial value assignment, 42 initialization, 38 named element, 38, 135 network, 12, 94 direction of flow, 135 evaluation, 66, 136, 141, 143 function block diagram (FBD), 86, 89 label, 138 ladder diagram (LD), 86, 139 sequential function chart (SFC), 84, 98, 99 network, 135 numeric literals, 25 off-delay, 12, 81 on-delay, 12, 81 operand of an expression, 129 operator assignment, 33, 86, 133 overloaded, 53 precedence, 129, 130 Structured Text (ST), 129 symbols, 58, 60, 62, 65 output action control, 94 declaration, 69 function block, 132, 143 location prefix, 37 negated, 47 program, 111 string, 56 typed, 53 values, 66 variable declaration, 39 variables, 67, 83, 140 variables, 66 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST 61131-3 IEC:2003(E) 61131-3 IEC:2003(E) – 217 – overloading, 53 of operators, 130 parentheses, 24, 33, 38, 43, 86, 130 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - power flow, 93, 135, 138, 139, 141 power rails, 139 power rails, 135, 138, 139 pre-emptive scheduling, 114 priority of tasks, 114 of transitions, 100 program, 14, 18, 83 communication, 16 compliance, 22 declaration, 39, 83, 111 declaration, 66, 75 retentive, 85 scheduling, 114 SFC structuring, 84 program organization unit, 45, 66 compliance, 20 declaration, 39, 46 initial state, 84 jumps in, 138 networks in, 135, 136, 141 scheduling, 114 SFC partitioning of, 84 state, 84 programming, 18, 139 programming, 143 real literal, 25 resource, 14, 83 communication, 17 declaration, 110 global variables in, 111 initialization, 15, 38 programming, 18 starting and stopping, 15, 115 retentive data declaration, 39, 83 in function blocks, 69 in steps, 85 initial value assignment, 42 initialization, 38 type assignment, 41 return, 132, 133, 138 rising edge, 69, 71, 78, 114, 206 rung, 139 rung, 89 scope global, 111 Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST – 218 – of actions, 89 of declarations, 40 of function block instances, 66 of networks, 135 of steps, 84 of transitions, 87 selection functions, 59, 66 statements, 133 semantics Structured Text (ST), 129 semigraphic representation, 69, 114, 135, 136 sequential function chart (SFC) activity flow, 135 compliance, 108 convergence, simultaneous, 100 divergence, selection, 100 divergence, simultaneous, 100 elements, 14, 84 elements, 123, 134, 135 elements, compatibility of, 107 errors, 100 evolution, 99 programming, 18 signal flow, 135, 143 single data element, 35, 36 step, 84 action association, 91 activation, 100 activation, 99 active, 84, 85, 100 active, 95 deactivation, 84, 91, 99 duration, 100 elapsed time, 84, 85 flag, 84, 85 inactive, 84 initial, 84, 85, 99 initialization, 85 retentive, 85 state, 84, 99, 100, 105 structured data type, 67 declaration, 32 initialization, 33 usage, 35 structured variable, 38 assignment, 133 declaration, 42 initialization, 42 step elements, 84 subscripting, 38 array initialization, 43 symbolic representation, 36, 41 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST 61131-3 IEC:2003(E) 61131-3 IEC:2003(E) – 219 – synchronization interprocess, 134 of function blocks, 114 syntax, 14 documentation, 21 step/transition, 100 task, 14, 114 declaration, 110 programming, 18 TIME data type, 30, 84, 85, 93 default initial value, 34 function blocks, 81 functions, 64 time literal, 28 time of day data types, 30 default initial value, 34 functions, 64 keywords, 29 literals, 28 timer, 81 transition, 84, 86 clearing, 99, 100 clearing time, 100 condition, 84, 86, 89, 99 enabled, 99 evaluation, 100 priority, 100 symbol, 99 type conversion functions, 53, 55 typed literals, 26 underline character, 23, 25, 53 unsigned integer, 135 data types, 30 variable, 36 declaration, 50, 69 usage, 35 WAIT function, 89, 134 warm restart, 38 white space, 24 wired OR, 143 ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST Standards Survey The IEC would like to offer you the best quality standards possible To make sure that we continue to meet your needs, your feedback is essential Would you please take a minute to answer the questions overleaf and fax them to us at +41 22 919 03 00 or mail them to the address below Thank you! Customer Service Centre (CSC) International Electrotechnical Commission 3, rue de Varembé 1211 Genève 20 Switzerland or Fax to: IEC/CSC at +41 22 919 03 00 Thank you for your contribution to the standards-making process Nicht frankieren Ne pas affranchir A Prioritaire Non affrancare No stamp required RÉPONSE PAYÉE Customer Service Centre (CSC) International Electrotechnical Commission 3, rue de Varembé 1211 GENEVA 20 Switzerland Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - SUISSE Q1 Please report on ONE STANDARD and ONE STANDARD ONLY Enter the exact number of the standard: (e.g 60601-1-1) Q6 standard is out of date standard is incomplete standard is too academic standard is too superficial title is misleading I made the wrong choice other Q2 Please tell us in what capacity(ies) you bought the standard (tick all that apply) I am the/a: purchasing agent librarian researcher design engineer safety engineer testing engineer marketing specialist other Q3 Q7 I work for/in/as a: (tick all that apply) manufacturing consultant government test/certification facility public utility education military other ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Q5 This standard meets my needs: (tick one) not at all nearly fairly well exactly Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS 4 4 I read/use the: (tick one) French text only English text only both English and French texts This standard will be used for: (tick all that apply) general reference product research product design/development specifications tenders quality assessment certification technical documentation thesis manufacturing other Please assess the standard in the following categories, using the numbers: (1) unacceptable, (2) below average, (3) average, (4) above average, (5) exceptional, (6) not applicable timeliness quality of writing technical contents logic of arrangement of contents tables, charts, graphs, figures other Q8 Q4 If you ticked NOT AT ALL in Question the reason is: (tick all that apply) Q9 4 Please share any comment on any aspect of the IEC that you would like us to know: Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ISBN 2-8318-6653-7 -:HSMINB=][ ZX[: ICS 25.040; 35.240.50 Typeset and printed by the IEC Central Office GENEVA, SWITZERLAND ``,`,`,,,``````,,``,,``,,,,`,-`-`,,`,,`,`,,` - Copyright International Electrotechnical Commission Provided by IHS under license with IEC No reproduction or networking permitted without license from IHS Licensee=Technip Abu Dabhi/5931917101 Not for Resale, 02/12/2006 07:01:30 MST ... 2 .3. 2 Generic data types .31 2 .3. 3 Derived data types 32 2 .3. 3.1 Declaration 32 2 .3. 3.2 Initialization 33 2 .3. 3 .3 Usage 35 ... TIME_OF_DAY#15 :36 :55 .36 time_of_day#15 :36 :55 .36 TOD#15 :36 :55 .36 tod#15 :36 :55 .36 DATE_AND_TIME#1984-06-25-15 :36 :55 .36 date_and_time#1984-06-25-15 :36 :55 .36 DT#1984-06-25-15 :36 :55 .36 dt#1984-06-25-15 :36 :55 .36 ... 133 3. 3.2.2 Function and function block control statements 133 3. 3.2 .3 Selection statements . 133 3. 3.2.4 Iteration statements 134 Graphic languages